TC-10 User Manual
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version 3.9
page 17
Now turn on the INTEGRATION and set it approximately to the first scale mark. You
will hear a “Click” if the INTEGRATION gets active.
The actual temperature at the sensor will now reach the desired temperature possibly
after a small overshoot. Wait again until the steady state value is reached. If this value
is not reached set the GAIN to higher levels until - in this example - 35 °C to 35.5 °C is
reached.
If the desired temperature is not reached first set the GAIN to a slightly higher level and
then – if necessary – raise the INTEGRATION (see Figure 6).
Note
: The speed of the control circuit (and therefore the time in which the actual temperature
reaches the DESIRED TEMPERATURE) is highly dependent on the first settings of GAIN and
INTEGRATION. Thus, when beginning to use the TC-10 we recommend to try out several first
settings of GAIN and INTEGRATION to find out which settings are best for your experimental
conditions.
If you use a perfusion system it is recommended to heat the solution approximately to the
desired temperature
before
perfusing the bath either with a heated perfusion tube (HPT-2A,
available from npi) or by heating up the supplying bowl.
As mentioned above it is very important that the sensor element and the heating element are in
good thermal connection.
In Figure 6 the time course of temperature regulation of the TC-10 is shown. As resistive load
a bulb (12V, 21W) was used. The temperature sensor was fixed directly on the bulb and sensor
and bulb were wrapped with foam. Starting temperature was 27,3 °C. Starting conditions were:
LIMITER set to 0, GAIN set to 0, INTEGRATION off.
Figure 6: Time course of temperature regulation of the TC-10.
1
: LIMITER was set to 100%, GAIN was set to the seventh scale mark
2
: GAIN was set to the eighth scale mark
3
: INTEGRATION was turned on at a low level
25
27
29
31
33
35
37
39
0
100
200
300
400
500
600
700
800
900
1000
temperature (°C)
time (s)
1
2
3